Naslov
Investigation of stainless steel crevice corrosion by a new test method in natural, biochemical synthetic water, and a chloride solution

Autori
Lahodny-Šarc, Olga ; Krstulović, Ljiljana ; Kulušić, Biserka ; Sambrailo, Dubravko ; Ivić, Jure

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings EUROCORR 2004. ; Long Term Prediction & Modeling of Corrosion ; EFC Event No.266 ; CD ROM Paper No.09-265 / - Nica, 2004, Paper No.09-265, pp 1

Skup
EUROCORR 2004. ; Long Term Prediction & Modeling of Corrosion ; European Federation of Corrosion (EFC), Event No.266

Mjesto i datum
Nica, Francuska, 12.09.2004. - 16.09.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
natural and synthetic seawater; chloride solution; crevice; stainless steel.

Sažetak
Austenitic and duplex stainless steels have been investigated on crevice corrosion in natural and synthetic biochemical water, and in a chloride solution using a new test method developed by the Group Crevcorr of the Marine Corrosion Working Party of the European Federation of Corrosion. Crevice corrosion of passive alloys is one of the main risks of corrosion attack in the seawater. The other generally used tests have been shown to be valuable mainly for ranking different alloys related to the environmental use. New test takes into account the geometry of the crevice model, gasket materials, applied torque, finishing surface, and a composition of synthetic electrolyte, potential in crease rate and temperature [1, 2]. In this work results of measurements in the natural seawater from the Adriatic Sea in Dubrovnik, Croatia, have been compared with those obtained in biochemical synthetic water, and the chloride solution with the sodium chloride concentration adequate to the chloride content at the location in Dubrovnik. In the synthetic seawater the organic component was replaced by glucose and glucose oxidase [3]. To assess the influence of natural bio film, glucose oxidase, and chloride content on the crevice corrosion initation, the monitoring of a free corrosion potential and the redox potential was performed at 20°, 30°, and 40°C, during five days with steel specimens in all three solutions. All experiments were performed in three parallel tests showing a good reproducibility.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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